The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Gray Code Decoder in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 155th rhdqor213 0 71 4ms 15 hours ago 162nd dokutan 0 72 525ms 15 Aug 2025 162nd rucin93 🇵🇱 0 72 9ms 18 days ago 162nd aksyristos 0 72 247ms 13 days ago 162nd blaztoma 🇱🇹 0 72 123ms 32 hours ago 162nd Emutis 🇱🇹 0 72 121ms 31 hours ago 162nd KasperKivimaeki 🇫🇮 0 72 4ms 27 hours ago 162nd edsrzf 🇳🇿 0 72 9ms 13 hours ago 169th IISResetMe 0 73 310ms 10 Jan 2026 169th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 169th Steffan153 🇫🇮 0 73 1,278ms 19 Feb 2026 172nd saito-ta 🇯🇵 0 74 3ms 11 May 2025 172nd kg583 🇺🇸 0 74 135ms 3 Oct 2025 172nd error256 0 74 3ms 12 Jan 2026 172nd lukegustafson 🇺🇸 0 74 189ms 16 days ago 172nd albanian-laundromat 0 74 9ms 8 days ago 177th kg583 🇺🇸 0 75 38ms 1 Dec 2024 177th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 177th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 177th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 177th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 177th albanian-laundromat 0 75 108ms 5 Jan 2026 177th albanian-laundromat 0 75 455ms 6 Jan 2026 177th GolfingSuccess 🇬🇷 0 75 18ms 11 Jan 2026 177th albanian-laundromat 0 75 238ms 23 days ago 177th madex 🇩🇪 0 75 18ms 7 days ago 177th CaedenHarper 🇨🇦 0 75 149ms 4 days ago 177th fuzzylojik-golf 🇺🇸 0 75 123ms 47 hours ago 177th Yax42 🇫🇷 0 75 4ms 28 hours ago 177th edsrzf 🇳🇿 0 75 17ms 14 hours ago 177th plcc0 0 75 22ms 8 hours ago 177th zgialor-lab 0 75 25ms 5 hours ago 193rd Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 193rd ovs-code 🇩🇪 0 76 3ms 10 May 2025 193rd AlephSquirrel 0 76 43ms 3 Dec 2025 193rd AlephSquirrel 0 76 445ms 3 Dec 2025 193rd albanian-laundromat 0 76 18ms 22 days ago 193rd albanian-laundromat 0 76 188ms 16 days ago 193rd MeWhenI 🇻🇦 0 76 586ms 9 days ago 200th CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 200th ndren 0 77 20ms 3 Dec 2024 200th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 200th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 200th DialFrost 🇸🇬 0 77 19ms 8 May 2025 200th emgordon154 0 77 161ms 9 May 2025 200th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 200th addmai 0 77 20ms 24 Jul 2025 200th hiichbindermax 0 77 19ms 17 Aug 2025 200th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 200th davecame 0 77 135ms 25 Sep 2025 200th SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 200th jtaxen 0 77 19ms 16 Oct 2025 200th albanian-laundromat 0 77 19ms 25 Nov 2025 200th albanian-laundromat 0 77 412ms 6 Dec 2025 200th anter69 🇭🇺 0 77 139ms 4 Feb 2026 200th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 200th KasperKivimaeki 🇫🇮 0 77 564ms 9 days ago 200th StefanHabel 🇨🇦 0 77 1,207ms 41 hours ago 200th ahmetdemirag 🇨🇾 0 77 18ms 36 hours ago 200th tomh1012 0 77 17ms 34 hours ago 200th HumanoidCPU 0 77 230ms 23 hours ago 200th qpwoeirut 0 77 20ms 19 hours ago 200th btjones0 0 77 19ms 16 hours ago 200th ComradeSquirrel 0 77 18ms 15 hours ago 200th bzijlema 🇳🇱 0 77 18ms 13 hours ago 226th jameswmccarty 0 78 20ms 29 Mar 2025 226th DialFrost 🇸🇬 0 78 940ms 10 May 2025 226th DialFrost 🇸🇬 0 78 3ms 10 May 2025 226th solisolu 0 78 20ms 10 Nov 2025 230th BREMAUCY 🇫🇷 0 79 18ms 37 hours ago 230th Andrey2001 0 79 18ms 31 hours ago 230th edsrzf 🇳🇿 0 79 30ms 13 hours ago 230th madex 🇩🇪 0 79 416ms 54 mins ago 234th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 234th error256 0 80 466ms 16 Jan 2026 234th stefangimmillaro 0 80 19ms 18 hours ago 234th albanian-laundromat 0 80 28ms 17 hours ago 238th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 239th bricknellj 0 82 17ms 30 Jan 2025 239th dokutan 0 82 17ms 15 Aug 2025 First Prev 161–240 of 335 Next Last